Project Details:

Seedling Diseases of Soybean: Characterization and Education (Year 1 of 1520-532-5667)

Parent Project: This is the first year of this project.
Checkoff Organization:United Soybean Board
Categories:Breeding & genetics
Organization Project Code:1520-532-5667
Project Year:2015
Lead Principal Investigator:Jason Bond (Southern Illinois University at Carbondale)
Co-Principal Investigators:
Leonor Leandro (Iowa State University)
Gary Munkvold (Iowa State University)
Alison Robertson (Iowa State University)
Christopher Little (Kansas State University)
Martin Chilvers (Michigan State University)
Berlin Nelson (North Dakota State University)
Kiersten Wise (Purdue University)
John Rupe (University of Arkansas)
Heather Kelly (University of Tennessee-Institute of Agriculture)
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Contributing Organizations

Funding Institutions

Information and Results

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Project Summary

Seedling diseases rank in the top five, disease threats to soybean, because their insidious nature makes them difficult to diagnose and control. It is nearly impossible to predict when they will take a heavy toll, until it happens. This project will determine the impact of environmental conditions on the epidemiology of important seedling pathogens. Producers will see benefits in the form of management recommendations and educational efforts. Producers would also see their check-off funding being maximized by the synergy of this team and with the USDA-NIFA oomycete project. A separate seedling disease proposal will be submitted to NCSRP to identify diagnostic tools, characterize biology of seedling pathogens and develop soybean germplasm assays. The NCSRP and USB team will collaborate and work together in a similar manner to the previous 3-year joint, USB-NCSRP project.

Project Objectives

1. Determine the effect of temperature, soil type/texture and pH on infection by F. oxysporum.
2. Characterize the species complex associated with soybean iron chlorosis in field conditions.
3. Evaluate the effect of pH on seedling disease caused by specific pathogen interactions.
4. Examine stress factors such as temperature, pH and water stress at various inoculum densities of two pathogens.
5. Evaluate the effect of temperature on pathogenicity of multiple species of Pythium, Fusarium and Rhizoctonia.
6. Conduct a metagenomics analysis to improve our understanding of seedling biology and the environmental conditions that favor disease.
7. Test the effects of environmental conditions on pathogenicity for multiple isolates of F. proliferatum, F. solani and F. tricinctum.
8. Examine the impact of soil texture, soil abiotic properties, tillage and crop rotation on seedling disease.
9. Establish a baseline inter- and intra-field variability for seedling pathogens.
10. Determine the impact of cover crops on causal agents of seedling disease.

Project Deliverables

1) Determine effect of environmental conditions on the aggressiveness of seedling pathogens
2) Identification of fungal and oomycete species associated with iron chlorosis
3) Identification of field conditions (moisture, temperature and chemical properties) that favor seedling
4) Diagnostic tools that will aid in diagnosing problem fields and aid other research endeavors by public and private researchers
5) Development of management strategies and to assess current production practices as they relate to seedling diseases
6) Development of national extension publications as a traditional fact sheet, and digitally as an audio and video

Progress of Work

Final Project Results

Benefit to Soybean Farmers

Performance Metrics

• A report will be developed that measures the coordination and communication between this seedling disease group, the industry and other soybean disease working groups. This group has been collaborating with the USDA oomycete project and with industry. Several members of this research team shared results and coordination efforts at the national meeting for the oomycete group. Industry representatives were invited to the annual meeting for this seedling disease group. This will result in broad dissemination of results, and also provide insight to how the industry may respond to the results of this project.
• A complete characterization will be developed for the pathogens and the impact of environmental conditions. This may be in the form of a chart that has the pathogen species and what is learned about the environmental impacts. This deliverable will be measured by the requests of this valuable information by other researches and the industry.
• Metagenomic tools that can be used to study seedling pathogens will help researchers in this project and in other groups. The adoption of this tool will be quantified by the request for the protocols developed in this project.
• A subset of the researchers on this team are some of the most effective extension/educators in the U.S. They will use their collective talents to produce traditional education fact sheets in addition to innovative videos and instruction. Performance will be measured by the delivery of these materials, and also the web counts and distribution of the electronic materials.

Project Years